48 



BULLETIN 429, U. S. DEPARTMENT OF AGRICULTURE. 



The emergence of moths of the first generation is shown in the 

 diagram appearing as figure 9. The larvae used in these experiments 

 were collected regularly from May 20 until June 22 from banded 

 trees, and the curve in this figure represents the sum total of daily 

 emergence from these larvae. 





JUNC 



JULY \ 



260 

 2SO 

 240 

 230 

 220 

 210 

 200 

 /30 

 180 

 170 

 160 

 /SO 

 /*0 

 /30 

 J 20 

 / 10 

 /OO 

 90 

 80 



?o 



60 

 SO 

 + 

 30 

 20 

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Fig. 9.— Curve showing emergence of codling moths of first brood, Roswell, N. Hex., 1913. (Original.) 



LIFE CYCLE OP FIRST GENERATION. 



The entire length of time required for the first generation of the 

 codling moth to pass through the several stages and reach the adult 

 stage is totaled in Table XL. 



